Exmark NAV20KC - Manual (Page 28)

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f) DO NOT wash or use pressurized air to clean paper element or inner element.
g) Reinstall elements. Position the cover so that the rubber dust ejector is
pointing downward and secure with retaining clips.
4.1.7 Change engine oil:
Service Interval: 100 hrs.
NOTE: Change oil and filter after first five (5) hrs. of operation.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Tilt hopper up to gain access to the engine area.
c) Drain oil while engine is warm from operation.
d) The oil drain valve is located on left hand side of engine at the back of the
unit.
Place pan under machine to catch oil and open valve. Allow oil to drain,
then close valve.
e) Replace the oil filter every other oil change. Clean around oil filter and
unscrew filter to remove. Before reinstalling new filter, apply a thin coating of
oil on the surface of the rubber seal. Turn filter clockwise until rubber seal
contacts the filter adapter then tighten filter an additional 2/3 to 3/4 turn.
f) Clean around oil fill cap and remove cap. Fill to specified capacity and replace
cap. Use oil recommended in engine owner’s manual. DO NOT overfill.
g) Lower hopper.
h) Start the engine and check for leaks.
4.1.8 Check hydraulic oil level:
Service Interval: 40 hr.
a) Stop engine and wait for all moving parts to stop.
b) Tilt hopper up.
c) Clean area around hydraulic reservoir cap and remove cap. Oil level should
be to the top of the baffle inside the tank. If not, add oil. Use only Mobil 1
15W-50 synthetic motor oil. Replace hydraulic reservoir cap and tighten
until snug. Do not overtighten.
NOTE: The baffle is labeled “HOT” and “COLD”. The oil level varies with
the temperature of the oil. The “HOT” level shows the level of oil when it is
at 225°F (107°C). The “COLD” level shows the level of the oil when it is at
75°F (24°C). Fill to the appropriate level depending upon the temperature
of the oil. For example: If the oil is about 150° F (65°C), fill to halfway
between the “HOT” and “COLD” levels. If the oil is at room temperature
(about 75° F (24°C)), fill only to the “COLD” level.
4.1.9 Check tire pressures:
Service Interval: 40 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Check tire pressure in drive tires. Inflate drive tires to 15 psi (103 kPa).
c) The rear caster tire is semi-pneumatic and does not need to be inflated.
NOTE: Do not add any type of tire liner or foam fill material to the tires.
Excessive loads created by foam filled tires may cause failures to the hydro drive
system, frame, and other components. Foam filling tires will void the warranty.